linux-kernel - Re: [PATCH v4 05/11] ASoC: jz4740-i2s: Use FIELD_PREP() macros in hw

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Date:   Wed, 20 Jul 2022 12:52:34 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Aidan MacDonald <aidanmacdonald.0x0@...il.com>
Cc:     lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, linux-mips@...r.kernel.org,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 05/11] ASoC: jz4740-i2s: Use FIELD_PREP() macros in
 hw_params callback

Hi Aidan,

Le ven., juil. 8 2022 at 17:02:38 +0100, Aidan MacDonald 
<aidanmacdonald.0x0@...il.com> a écrit :
> Get rid of a couple of macros and improve readability by using
> FIELD_PREP() and GENMASK() for the sample size setting.
> 
> Acked-by: Paul Cercueil <paul@...pouillou.net>
> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>

Reviewed-by: Paul Cercueil <paul@...pouillou.net>

Cheers,
-Paul

> ---
>  sound/soc/jz4740/jz4740-i2s.c | 17 ++++++++---------
>  1 file changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/sound/soc/jz4740/jz4740-i2s.c 
> b/sound/soc/jz4740/jz4740-i2s.c
> index 043f100a9cfa..d0791dfa9c7b 100644
> --- a/sound/soc/jz4740/jz4740-i2s.c
> +++ b/sound/soc/jz4740/jz4740-i2s.c
> @@ -3,6 +3,7 @@
>   *  Copyright (C) 2010, Lars-Peter Clausen <lars@...afoo.de>
>   */
> 
> +#include <linux/bitfield.h>
>  #include <linux/init.h>
>  #include <linux/io.h>
>  #include <linux/kernel.h>
> @@ -42,8 +43,8 @@
>  #define JZ_AIC_CONF_SYNC_CLK_MASTER BIT(1)
>  #define JZ_AIC_CONF_ENABLE BIT(0)
> 
> -#define JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_MASK (0x7 << 19)
> -#define JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK (0x7 << 16)
> +#define JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE GENMASK(21, 19)
> +#define JZ_AIC_CTRL_INPUT_SAMPLE_SIZE GENMASK(18, 16)
>  #define JZ_AIC_CTRL_ENABLE_RX_DMA BIT(15)
>  #define JZ_AIC_CTRL_ENABLE_TX_DMA BIT(14)
>  #define JZ_AIC_CTRL_MONO_TO_STEREO BIT(11)
> @@ -61,9 +62,6 @@
>  #define JZ4760_AIC_CTRL_TFLUSH BIT(8)
>  #define JZ4760_AIC_CTRL_RFLUSH BIT(7)
> 
> -#define JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_OFFSET 19
> -#define JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET  16
> -
>  #define JZ_AIC_I2S_FMT_DISABLE_BIT_CLK BIT(12)
>  #define JZ_AIC_I2S_FMT_DISABLE_BIT_ICLK BIT(13)
>  #define JZ_AIC_I2S_FMT_ENABLE_SYS_CLK BIT(4)
> @@ -248,8 +246,9 @@ static int jz4740_i2s_hw_params(struct 
> snd_pcm_substream *substream,
>  	}
> 
>  	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> -		ctrl &= ~JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_MASK;
> -		ctrl |= sample_size << JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE_OFFSET;
> +		ctrl &= ~JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE;
> +		ctrl |= FIELD_PREP(JZ_AIC_CTRL_OUTPUT_SAMPLE_SIZE, sample_size);
> +
>  		if (params_channels(params) == 1)
>  			ctrl |= JZ_AIC_CTRL_MONO_TO_STEREO;
>  		else
> @@ -257,8 +256,8 @@ static int jz4740_i2s_hw_params(struct 
> snd_pcm_substream *substream,
> 
>  		div_field = i2s->field_i2sdiv_playback;
>  	} else {
> -		ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK;
> -		ctrl |= sample_size << JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET;
> +		ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE;
> +		ctrl |= FIELD_PREP(JZ_AIC_CTRL_INPUT_SAMPLE_SIZE, sample_size);
> 
>  		div_field = i2s->field_i2sdiv_capture;
>  	}
> --
> 2.35.1
>